Kado: The Right Answer is a Japanese CG animation television series produced by Toei Animation. The series first aired in April 2017 and ended in June 2017. The series follows master negotiator Kōjirō Shindō, working for the Ministry of Foreign Affairs, as he chooses to represent Yaha-kui zaShunina, an otherworldly entity with the main intention to advance the world by progressively introducing four mysterious devices to humanity. The episode zero, which tells the event before Kōjirō and Shun taking off on the plane, was exclusively distributed via Amazon Prime Video in Japan and Crunchyroll.